Effect of an ac Perturbation on the Electroosmotic Behavior of a Cation-Exchange Membrane. Influence of the Cation Nature

Barragán, V.M.; Bauzá, Carlos Ruiz

doi:10.1006/jcis.2001.7610

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…Another maximum value is also observed at frequencies of the order of megahertz. These results are in agreement with those obtained in previous works , with an ionics membrane, where a similar spectrum was reported for the electroosmotic permeability in different experimental conditions.…”

Section: Resultssupporting

confidence: 93%

“…We have no information about the value of the diffusion coefficient of the counterion in the membrane phase. On the basis of previous results, , it can be assumed that this characteristic frequency is associated with the electrical double layer. In this case, by using eq and supposing that the maximum observed is due to the Maxwell polarization, we can estimate the value of D̅ 1 using the experimental f* 6 frequencies.…”

Section: Resultsmentioning

confidence: 97%

“…In previous studies, , we checked the validity of the linear phenomenological eq in the presence of an ac perturbation. The results obtained showed that a linear relation existed between the volume flow and the applied dc voltage under all the studied conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies − have shown that the dispersion of the dielectric properties may influence the electrokinetic phenomena and in particular the electroosmotic transport. Under an alternating field, a dispersion with the frequency of the ac perturbation was observed in the electroosmotic transport though a typical ion-exchange membrane.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Internal Morphology of Cation-Exchange Membranes by Means of Electroosmotic Permeability Relaxations

et al. 2009

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The effect of an ac sinusoidal perturbation of known amplitude and frequency superimposed to the usual dc applied electric voltage difference on the electroosmotic flow through three cation-exchange membranes with different morphology has been studied. A dispersion of the electroosmotic permeability on the frequency of the applied ac signal has been found for the three membranes investigated, observing that the electroosmotic permeability reaches maximum values for some characteristic values of the frequency. These characteristic frequency values, which are related to relaxation processes in heterogeneous media, depend on the membrane system and permit to obtain information about the different structures of the membrane system. Thus, the study of the electroosmotic permeability relaxation can be used as a method to study the internal morphology of a cation-exchange membrane in a given electrolyte medium.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of the Internal Morphology of Cation-Exchange Membranes by Means of Electroosmotic Permeability Relaxations

et al. 2009

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“…If one takes into account that V AgCl − V Ag = 15.5 × 10 −6 m 3 /mol, and F = 96500 C/mol, the electroosmotic flow in either capillary is given by [13] (3)…”

Section: Apparatus and Proceduresmentioning

confidence: 99%